Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 268 · 40 questions

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

1. 1.What does a thermistor do? (a) beeps for an alarm (b) is a resistance knob (c) senses how hot it is (d) stores a little charge
2. 2.🧩 Which component blows if current is high? (a) resistor (b) thermistor (c) fuse (d) diode
3. 3.🧩 Which component makes things spin? (a) fuse (b) capacitor (c) motor (d) buzzer
4. 4.True or false: a resistor limits the current. (a) True (b) False
5. 5.True or false: a motor makes things spin. (a) True (b) False
6. 6.🧩 Which component has coloured bands? (a) LED (b) resistor (c) buzzer (d) motor
7. 7.What does a transistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) turns a fan or wheels (d) boosts a small signal
8. 8.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) potentiometer (d) LED
9. 9.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) turns a fan or wheels (d) senses how bright it is
10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
11. 11.🧩 Which component turns a fan or wheels? (a) motor (b) diode (c) resistor (d) thermistor
12. 12.True or false: a potentiometer is a resistance knob. (a) False (b) True
13. 13.What does a diode do? (a) has coloured bands (b) lets current go one way (c) senses how bright it is (d) senses how hot it is
14. 14.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
15. 15.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
16. 16.What does a buzzer do? (a) glows using little power (b) stores a little charge (c) makes a beeping sound (d) makes things spin
17. 17.🧩 Which component glows using little power? (a) LED (b) resistor (c) thermistor (d) transistor
18. 18.True or false: a buzzer stores a little charge. (a) True (b) False
19. 19.🧩 Which component smooths a wobbly supply? (a) buzzer (b) transistor (c) diode (d) capacitor
20. 20.🧩 Which component limits the current? (a) resistor (b) capacitor (c) potentiometer (d) diode
21. 21.🧩 Which component senses how hot it is? (a) LDR (b) transistor (c) motor (d) thermistor
22. 22.What does a fuse do? (a) makes a beeping sound (b) stores a little charge (c) blows if current is high (d) beeps for an alarm
23. 23.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) stores a little charge (d) senses how hot it is
24. 24.True or false: a motor lets current go one way. (a) True (b) False
25. 25.What does a motor do? (a) limits the current (b) stores a little charge (c) makes things spin (d) makes a beeping sound
26. 26.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
27. 27.🧩 Which component lets current go one way? (a) transistor (b) diode (c) fuse (d) thermistor
28. 28.True or false: a motor stores a little charge. (a) False (b) True
29. 29.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) LDR (d) potentiometer
30. 30.What does an LDR do? (a) makes things spin (b) turns a fan or wheels (c) senses how bright it is (d) has coloured bands
31. 31.True or false: a thermistor senses how hot it is. (a) False (b) True
32. 32.True or false: a buzzer beeps for an alarm. (a) False (b) True
33. 33.True or false: a diode blows if current is high. (a) True (b) False
34. 34.True or false: a capacitor stores a little charge. (a) False (b) True
35. 35.What does a capacitor do? (a) makes things spin (b) senses how hot it is (c) has coloured bands (d) stores a little charge
36. 36.True or false: an LDR glows using little power. (a) False (b) True
37. 37.🧩 Which component senses how bright it is? (a) capacitor (b) potentiometer (c) transistor (d) LDR
38. 38.What does a motor do? (a) boosts a small signal (b) stores a little charge (c) makes a beeping sound (d) turns a fan or wheels
39. 39.True or false: a motor boosts a small signal. (a) True (b) False
40. 40.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel

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